WO2018077027A1 - 蓄电池的低电压保护装置 - Google Patents

蓄电池的低电压保护装置 Download PDF

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Publication number
WO2018077027A1
WO2018077027A1 PCT/CN2017/105568 CN2017105568W WO2018077027A1 WO 2018077027 A1 WO2018077027 A1 WO 2018077027A1 CN 2017105568 W CN2017105568 W CN 2017105568W WO 2018077027 A1 WO2018077027 A1 WO 2018077027A1
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Prior art keywords
relay
circuit
control system
normally open
battery
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PCT/CN2017/105568
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English (en)
French (fr)
Inventor
白光辉
谷龙飞
马文利
李硕
郭帅
Original Assignee
中国恩菲工程技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from CN201610972321.7A external-priority patent/CN108023372A/zh
Priority claimed from CN201621195671.9U external-priority patent/CN206211583U/zh
Application filed by 中国恩菲工程技术有限公司 filed Critical 中国恩菲工程技术有限公司
Publication of WO2018077027A1 publication Critical patent/WO2018077027A1/zh
Priority to ZA201902681A priority Critical patent/ZA201902681B/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators

Definitions

  • the present invention relates to the field of battery power supply technologies, and in particular, to a low voltage protection device for a battery.
  • the control system When the battery power consumption reaches a certain level and the battery voltage follows below the allowable voltage of the control system, the control system will automatically stop working. When the control system stops working, as the battery load is greatly reduced, the battery voltage will gradually increase, the battery's own electric energy will recover, the battery voltage will once again meet the working requirements of the control system, and the control system will start working again. This process is repeated back and forth, causing damage to the control system.
  • the present invention aims to solve at least one of the technical problems in the related art to some extent.
  • the object of the present invention is to provide a low voltage protection device for a battery. After the main power supply circuit is disconnected, the device needs to be triggered by the user to control the main power supply circuit to be turned on by the startup circuit, so that the battery is given.
  • the control system supplies power, which effectively prevents low voltage oscillations caused by the battery directly supplying power to the control system, and avoids damage to the control system.
  • a low voltage protection device for a battery includes: a main power supply circuit, wherein the main power supply circuit is respectively connected to the battery and the control system; a start circuit for turning on the battery to supply power to the control system; and controlling the start circuit to be disconnected when the voltage of the battery is less than an operating voltage of the control system to disconnect the main power supply circuit An open low voltage cancel circuit; and a recovery circuit for controlling the start circuit to be turned on under user triggering.
  • the main power supply circuit is respectively connected to the battery and the control system, and the start circuit controls the main power supply circuit to be turned on to enable the battery to supply power to the control system, and the voltage of the low voltage cancellation circuit in the battery is less than the control system.
  • the starting circuit is disconnected to disconnect the main power supply circuit, and the recovery circuit controls the starting circuit to be turned on under the trigger of the user, so that after the main power supply circuit is disconnected, the main power supply circuit can be controlled by the starting circuit after the user is triggered. Conducted to enable the battery to supply power to the control system, thereby effectively preventing low voltage oscillations caused by the battery directly supplying power to the control system, and avoiding damage to the control system.
  • the starting circuit includes: a start switch, a first normally open contact of the first relay, and a coil of the first relay, the first normally open contact of the first relay
  • the start switch is connected in parallel with the coil of the first relay, wherein when the start switch is closed, the first normally open touch of the first relay The point is closed, the first normally open contact of the first relay and the coil of the first relay form a self-holding circuit, and the starting circuit is in a continuously conducting state.
  • the main power supply circuit includes: a second normally open contact of the first relay, wherein the main power supply circuit is continuously guided when the starting circuit is in a continuously conducting state Pass state.
  • the low voltage cancel circuit includes: a detection switch and a coil of the second relay, the detection switch being connected in series with a coil of the second relay; the recovery circuit comprising: a coil of the third relay, a normally open contact of the third relay and a first normally open contact of the second relay, wherein a normally open contact of the third relay is connected in parallel with a first normally open contact of the second relay
  • the coil of the third relay is connected in series;
  • the starting circuit further includes: a second normally open contact of the second relay and a normally closed contact of the third relay, the first normally open of the first relay a contact is connected in parallel with the start switch and in series with a second normally open contact of the second relay, and a second normally open contact of the second relay is connected in parallel with a normally closed contact of the third relay, wherein
  • the detecting switch is closed when a voltage of the battery is greater than or equal to an operating voltage of the control system; when the voltage of the battery is less than an operating voltage of the control system, the detecting switch is
  • the recovery circuit further includes: a reset switch, the reset switch is a normally closed switch, and the reset switch is interlocked with the start switch, wherein when the reset switch is turned off, The start switch is closed.
  • the start switch and the reset switch constitute a start reset button.
  • FIG. 1 is a block schematic diagram of a low voltage protection device for a battery according to an embodiment of the present invention
  • FIG. 2 is a circuit diagram of a low voltage protection device for a battery according to an embodiment of the present invention
  • FIG. 3 is a circuit diagram of a low voltage protection device for a battery according to another embodiment of the present invention.
  • the low voltage protection device of the battery includes a main power supply circuit 10, a startup circuit 20, a low voltage cancellation circuit 30, and a recovery circuit 40.
  • the main power supply circuit 10 is respectively connected to the battery and the control system, and the startup circuit 20 is used to control the main power supply back.
  • the circuit 10 is turned on to supply power to the control system.
  • the low voltage cancel circuit 30 is configured to control the start circuit 20 to be turned off to disconnect the main power supply circuit 10 when the voltage of the battery is lower than the operating voltage of the control system, and the recovery circuit 40 is used to The user activates the control start circuit 20 to be turned on.
  • the control system needs to be powered on, the user turns on the recovery circuit 40 to turn on the startup circuit 20.
  • the startup circuit 20 controls the main power supply circuit 10 to be turned on. Power is supplied to the control system and the control system begins to work.
  • the control system will send a contact signal to the low voltage cancel circuit 30.
  • the low voltage cancel circuit 30 turns off the control start circuit 20, and the main power supply circuit 10 is also disconnected, and the connection line between the battery and the control system is cut off. Only when the user passes the trigger recovery circuit 40 again to turn on the startup circuit 20, the main power supply circuit 10 is turned on, and the battery can be given to the control system, thereby effectively avoiding the automatic power supply to the control system when the battery voltage rises.
  • the back and forth power supply brings about the problem of damage to the control system.
  • the signal output by the control system with low supply voltage ie, the contact signal
  • the range of the external power supply voltage is used to the maximum extent, which is very advantageous for improving the adaptability of the control system.
  • the starting circuit 20 includes: a start switch SF, a first normally open contact KA11 of the first relay, and a coil KA1 of the first relay, the first normally open of the first relay
  • the contact KA11 is connected in series with the start switch SF in series with the coil KA1 of the first relay, wherein when the start switch SF is closed, the coil KA1 of the first relay is energized, causing the first normally open contact KA11 of the first relay to close.
  • the first normally open contact KA11 of the first relay forms a self-holding circuit with the coil KA1 of the first relay, and the starting circuit 20 is in a continuous conducting state.
  • the main power supply circuit 10 includes a second normally open contact KA12 of the first relay, wherein the main power supply circuit 10 is in a continuously conducting state when the starting circuit 20 is in a continuously conducting state.
  • the coil KA1 of the first relay will be energized, resulting in the first normally open contact KA11 of the first relay and the second normally open of the first relay.
  • the contacts KA12 are both closed, the main power supply circuit 10 is turned on, and the battery begins to supply power to the control system. Since the coil KA1 of the first relay and the first normally open contact KA11 of the first relay form a self-holding circuit, even if the starting switch SF is released, the second normally-opening contact KA12 of the first relay is closed.
  • the battery will continue to supply power to the control system. During the startup of the control system, if a low voltage occurs, the battery can be manually cut off to avoid opening and closing oscillations.
  • the low voltage cancel circuit 30 includes a detection switch P and a coil KA2 of the second relay, and the detection switch P is connected in series with the coil KA2 of the second relay.
  • the recovery circuit 40 includes: a coil KA3 of the third relay, a normally open contact KA31 of the third relay, and a first normally open contact KA21 of the second relay, a normally open contact KA31 of the third relay and a first of the second relay After the normally open contact KA21 is connected in parallel, it is connected in series with the coil KA3 of the third relay.
  • the starting circuit 20 further includes: a second normally open contact KA22 of the second relay and a normally closed contact KA32 of the third relay, the first normally open contact KA11 of the first relay is connected in parallel with the start switch SF and the second relay The second normally open contact KA22 is connected in series, and the second normally open contact KA22 of the second relay is connected in parallel with the normally closed contact KA32 of the third relay.
  • the detection switch P when the voltage of the battery is greater than or equal to the operating voltage of the control system, the detection switch P is closed; when the voltage of the battery is less than the operating voltage of the control system, the detection switch P is disconnected, the starting circuit 20 is disconnected, and the main power supply circuit 10 is disconnected. .
  • the recovery circuit 40 further includes: a reset switch SS, the reset switch SS is a normally closed switch, and the reset switch SS is interlocked with the start switch SF, wherein when the reset switch SS is turned off, the switch is activated. SF is closed.
  • the user presses the reset switch SS, at which time the reset switch SS is turned off, the start switch SF is closed, and the coil KA1 of the first relay is powered, the first relay
  • the first normally open contact KA11 and the second normally open contact KA12 of the first relay are both closed, and the battery supplies power to the control system through the second normally open contact KA12 of the first relay.
  • the detection switch P in the low voltage cancel circuit 30 When the control system is powered to start working, the detection switch P in the low voltage cancel circuit 30 will be closed (detecting whether the switch P is closed by the control system is energized to control), the coil KA2 of the second relay is energized, and the second relay is second. The normally open contact KA22 is closed.
  • the reset switch SS When the user releases the reset switch SS, the reset switch SS is closed, the start switch SF is turned off, although the start switch SF is turned off, but the first normally open contact KA11 of the first relay and the second normally open contact of the second relay The point KA22 is in the closed state. Therefore, the coil KA1 of the first relay still has a current flowing, and the second normally open contact KA12 of the first relay is still in the closed state, and the battery continues to supply power to the control system. Therefore, the control system does not cause a power failure due to the user releasing the reset switch SS.
  • the start switch SF and the reset switch SS can be replaced by a start reset button.
  • the first to third relays and the control system are all in the energized operating state.
  • the control system When the voltage of the battery is lower than the operating voltage allowed by the control system, the control system will stop. At this time, the detection switch P is automatically disconnected, the coil KA2 of the second relay is de-energized, and the second relay is second. The normally open contact KA22 is disconnected. Since the normally closed contact KA32 of the third relay is disconnected at this time, the coil KA1 of the first relay will be de-energized, and the second normally open contact KA12 of the first relay will be disconnected. This means that the connection line between the battery and the control system is disconnected.
  • the purpose of the normally open contact KA31 of the third relay in parallel with the first normally open contact KA21 of the second relay is to ensure that after the coil KA2 of the second relay is de-energized, the third relay The coil KA3 is still in the power-on state, and the normally-closed contact KA32 of the third relay is in the off state. Otherwise, when the coil KA2 of the second relay is de-energized, the first normally-open contact KA21 of the second relay is disconnected, The coil KA3 of the third relay is de-energized, and the normally-closed contact KA32 of the third relay is in a closed state. At this time, the coil KA1 of the first relay cannot be de-energized, and thus the connection line between the battery and the control system cannot be cut off.
  • the low voltage protection device of the battery of the embodiment of the present invention first activates the relay self-holding circuit by using a manual start reset button to supply power to the control system, and then outputs a contact signal after the control system is powered on.
  • the contact is used to cut off the self-holding circuit while the contact maintains the main power supply circuit in an on state.
  • the contact is disconnected, and the self-holding circuit of the contact is disconnected, and the power supply of the control system is cut off. Only when the manual reset button is restarted can the power supply be restored, which effectively avoids the problem of damage to the control system caused by the power supply to the control system automatically caused by the battery voltage rising.
  • the first to third relays and the control system can be powered by the same battery (L, N). At this time, the operating voltage range of the relay is much smaller than the operating voltage allowed by the control system. Range so that the relay can continue to operate when the control system is not working due to low battery voltage.
  • the main power supply circuit is respectively connected to the battery and the control system, and the start circuit controls the main power supply circuit to be turned on to enable the battery to supply power to the control system, and the low voltage cancels the voltage of the circuit at the battery.
  • the control start circuit is disconnected to disconnect the main power supply circuit, and the recovery circuit controls the start circuit to be turned on under the trigger of the user, so that after the main power supply circuit is disconnected, the user can trigger the control circuit through the startup circuit.
  • the main power supply circuit is turned on to enable the battery to supply power to the control system, thereby effectively preventing low voltage oscillation caused by the battery directly supplying power to the control system, thereby avoiding damage of the control system, and the device has low cost and high reliability, and has a very high Strong practicality.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of “plurality” is at least two, for example two , three, etc., unless otherwise specifically defined.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the first feature "on” or “under” the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact.
  • the first feature "above”, “above” and “above” the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

本发明公开了一种蓄电池的低电压保护装置，包括：主供电回路，主供电回路分别与蓄电池和控制系统相连；用以控制主供电回路导通以使蓄电池给控制系统供电的启动电路；用以在蓄电池的电压小于控制系统的工作电压时控制启动电路断开以使主供电回路断开的低压取消电路；以及用以在用户触发下控制启动电路导通的恢复电路。该装置在主供电回路断开后，需要在用户的触发下，才能通过启动电路控制主供电回路导通，以使蓄电池给控制系统供电，从而有效防止因蓄电池直接给控制系统供电导致的低电压振荡情况，避免控制系统发生损坏。

Description

蓄电池的低电压保护装置 技术领域
本发明涉及蓄电池供电技术领域，特别涉及一种蓄电池的低电压保护装置。
背景技术
在控制领域，存在大量使用蓄电池作为后备电源直接给控制系统供电的应用。
当蓄电池电能消耗到一定程度，蓄电池电压跟随下降到控制系统允许电压以下时，控制系统会自动停止工作。当控制系统停止工作后，由于蓄电池负载大幅度减小，蓄电池电压将逐渐升高，蓄电池自身电能恢复，蓄电池电压将再次满足控制系统的工作要求，控制系统重新开始工作。此种过程来回重复，会造成控制系统损坏。
发明内容
本发明旨在至少在一定程度上解决相关技术中的技术问题之一。
为此，本发明的目的在于提出一种蓄电池的低电压保护装置，该装置在主供电回路断开后，需要在用户的触发下，才能通过启动电路控制主供电回路导通，以使蓄电池给控制系统供电，从而有效防止因蓄电池直接给控制系统供电导致的低电压振荡情况，避免控制系统发生损坏。
为实现上述目的，本发明一方面实施例提出的一种蓄电池的低电压保护装置，包括：主供电回路，所述主供电回路分别与所述蓄电池和控制系统相连；用以控制所述主供电回路导通以使所述蓄电池给所述控制系统供电的启动电路；用以在所述蓄电池的电压小于所述控制系统的工作电压时控制所述启动电路断开以使所述主供电回路断开的低压取消电路；以及用以在用户触发下控制所述启动电路导通的恢复电路。
根据本发明实施例的蓄电池的低电压保护装置，主供电回路分别与蓄电池和控制系统相连，启动电路控制主供电回路导通以使蓄电池给控制系统供电，低压取消电路在蓄电池的电压小于控制系统的工作电压时控制启动电路断开以使主供电回路断开，恢复电路在用户触发下控制启动电路导通，以在主供电回路断开后，在用户触发下才能通过启动电路控制主供电回路导通，以使蓄电池给控制系统供电，从而有效防止因蓄电池直接给控制系统供电导致的低电压振荡情况，避免控制系统发生损坏。
根据本发明的一个实施例，所述启动电路包括：启动开关、第一继电器的第一常开触点和所述第一继电器的线圈，所述第一继电器的第一常开触点与所述启动开关并联后与所述第一继电器的线圈串联，其中，当所述启动开关闭合时，所述第一继电器的第一常开触 点闭合，所述第一继电器的第一常开触点与所述第一继电器的线圈形成自保持电路，所述启动电路处于持续导通状态。
根据本发明的一个实施例，所述主供电回路包括：所述第一继电器的第二常开触点，其中，当所述启动电路处于持续导通状态时，所述主供电回路处于持续导通状态。
根据本发明的一个实施例，所述低压取消电路包括：检测开关和第二继电器的线圈，所述检测开关与所述第二继电器的线圈串联；所述恢复电路包括：第三继电器的线圈、所述第三继电器的常开触点和所述第二继电器的第一常开触点，所述第三继电器的常开触点与所述第二继电器的第一常开触点并联后与所述第三继电器的线圈串联；所述启动电路还包括：所述第二继电器的第二常开触点和所述第三继电器的常闭触点，所述第一继电器的第一常开触点与所述启动开关并联后与所述第二继电器的第二常开触点串联，所述第二继电器的第二常开触点与所述第三继电器的常闭触点并联，其中，当所述蓄电池的电压大于等于所述控制系统的工作电压时，所述检测开关闭合；当所述蓄电池的电压小于所述控制系统的工作电压时，所述检测开关断开，所述启动电路断开，所述主供电回路断开。
根据本发明的一个实施例，所述恢复电路还包括：复位开关，所述复位开关为常闭开关，所述复位开关与所述启动开关互锁，其中，当所述复位开关断开时，所述启动开关闭合。
根据本发明的一个实施例，所述启动开关和所述复位开关构成启动复位按钮。
附图说明
图1是根据本发明实施例的蓄电池的低电压保护装置的方框示意图；
图2是根据本发明一个实施例的蓄电池的低电压保护装置的电路图；
图3是根据本发明另一个实施例的蓄电池的低电压保护装置的电路图。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
下面参考附图来描述本发明实施例的蓄电池的低电压保护装置。
图1是根据本发明实施例的蓄电池的低电压保护装置的方框示意图。如图1所示，该蓄电池的低电压保护装置包括：主供电回路10、启动电路20、低压取消电路30和恢复电路40。
其中，主供电回路10分别与蓄电池和控制系统相连，启动电路20用以控制主供电回 路10导通以使蓄电池给控制系统供电，低压取消电路30用以在蓄电池的电压小于控制系统的工作电压时控制启动电路20断开以使主供电回路10断开，恢复电路40用以在用户触发下控制启动电路20导通。
具体地，当控制系统需要上电工作时，用户通过触发恢复电路40以使启动电路20导通，当启动电路20导通后，启动电路20将控制主供电回路10导通，此时由蓄电池给控制系统供电，控制系统开始工作。
在控制系统工作过程中，随着蓄电池电能的消耗，蓄电池电压将逐渐降低，当蓄电池的电压低于控制系统所允许的电压时，控制系统将发出一个接点信号至低压取消电路30。低压取消电路30在接收到接点信号后，控制启动电路20断开，主供电回路10也随之断开，蓄电池与控制系统之间的连接线被切断。只有当用户再次通过触发恢复电路40以使启动电路20导通后，主供电回路10才会导通，此时蓄电池才能给控制系统，从而有效避免了因蓄电池电压升高时自动为控制系统供电所带来的来回供电，造成控制系统损坏的问题。
需要说明的是，在该实施例中由控制系统输出供电电压低的信号(即接点信号)最为准确，且最大限度的使用了外部供电电压的范围，对提高控制系统的适应性非常有利。
根据本发明的一个实施例，如图2所示，启动电路20包括：启动开关SF、第一继电器的第一常开触点KA11和第一继电器的线圈KA1，第一继电器的第一常开触点KA11与启动开关SF并联后与第一继电器的线圈KA1串联，其中，当启动开关SF闭合时，第一继电器的线圈KA1得电，导致第一继电器的第一常开触点KA11闭合，由此第一继电器的第一常开触点KA11与第一继电器的线圈KA1形成自保持电路，启动电路20处于持续导通状态。
进一步地，如图2所示，主供电回路10包括：第一继电器的第二常开触点KA12，其中，当启动电路20处于持续导通状态时，主供电回路10处于持续导通状态。
具体而言，当用户通过触发恢复电路40以使启动开关SF闭合时，第一继电器的线圈KA1将得电，导致第一继电器的第一常开触点KA11和第一继电器的第二常开触点KA12均闭合，主供电回路10导通，蓄电池开始给控制系统供电。由于第一继电器的线圈KA1和第一继电器的第一常开触点KA11形成自保持电路，因此，即使启动开关SF已松开，第一继电器的第二常开触点KA12闭合仍处于闭合状态，蓄电池将持续给控制系统供电。在控制系统启动过程中，如果出现低电压，则可以人工切断蓄电池，避免出现开合振荡现象。
根据本发明的一个实施例，如图3所示，低压取消电路30包括：检测开关P和第二继电器的线圈KA2，检测开关P与第二继电器的线圈KA2串联。
恢复电路40包括：第三继电器的线圈KA3、第三继电器的常开触点KA31和第二继电器的第一常开触点KA21，第三继电器的常开触点KA31与第二继电器的第一常开触点KA21并联后与第三继电器的线圈KA3串联。
启动电路20还包括：第二继电器的第二常开触点KA22和第三继电器的常闭触点KA32，第一继电器的第一常开触点KA11与启动开关SF并联后与第二继电器的第二常开触点KA22串联，第二继电器的第二常开触点KA22与第三继电器的常闭触点KA32并联。
其中，当蓄电池的电压大于等于控制系统的工作电压时，检测开关P闭合；当蓄电池的电压小于控制系统的工作电压时，检测开关P断开，启动电路20断开，主供电回路10断开。
进一步地，如图3所示，恢复电路40还包括：复位开关SS，复位开关SS为常闭开关，复位开关SS与启动开关SF互锁，其中，当复位开SS关断开时，启动开关SF闭合。
具体地，如图3所示，当需要蓄电池给控制系统供电时，用户按下复位开关SS，此时复位开关SS断开，启动开关SF闭合，第一继电器的线圈KA1得电，第一继电器的第一常开触点KA11和第一继电器的第二常开触点KA12均闭合，蓄电池通过第一继电器的第二常开触点KA12给控制系统供电。
当控制系统得电开始工作时，低压取消电路30中的检测开关P将闭合(检测开关P是否闭合由控制系统是否通电来控制)，第二继电器的线圈KA2得电，第二继电器的第二常开触点KA22闭合。
当用户松开复位开关SS时，复位开关SS闭合，启动开关SF断开，虽然启动开关SF断开，但由于第一继电器的第一常开触点KA11和第二继电器的第二常开触点KA22均处于闭合状态，因此，第一继电器的线圈KA1仍有电流流过，第一继电器的第二常开触点KA12仍处于闭合状态，蓄电池持续给控制系统供电。因此控制系统不会因为用户松开复位开关SS而导致断电。在实际应用中，可由启动复位按钮代替启动开关SF和复位开关SS。
当用户松开复位开关SS时，由于复位开关SS闭合，因此，第三继电器的线圈KA3将得电，第三继电器的常开触点KA31闭合，第三继电器的常闭触点KA32断开。此时虽然第三继电器的常闭触点KA32断开，但由于第二继电器的第二常开触点KA22闭合，因此，对第一继电器的线圈KA1不会产生影响。
至此，第一至第三继电器以及控制系统均处于通电工作状态。
在控制系统工作过程中，当蓄电池的电压低于控制系统允许的工作电压时，控制系统将停机，此时检测开关P自动断开，第二继电器的线圈KA2失电，第二继电器的第二常开触点KA22断开，由于此时第三继电器的常闭触点KA32断开，因此第一继电器的线圈KA1将失电，第一继电器的第二常开触点KA12将断开，这就意味着蓄电池与控制系统的连接线断开。因此，即便一段时间后，蓄电池的电压再次回升，也不会使得控制系统重新启动，除非用户再次按下复位开关SS，从而有效避免了因蓄电池直接给控制系统供电导致的低电压振荡情况，进而导致控制系统发生损坏的问题。
可以理解的是，在第二继电器的第一常开触点KA21处并联有第三继电器的常开触点KA31的目的，是为了保证在第二继电器的线圈KA2失电后，第三继电器的线圈KA3仍处于得电状态，第三继电器的常闭触点KA32处于断开状态，否则，当第二继电器的线圈KA2失电，第二继电器的第一常开触点KA21断开后，因第三继电器的线圈KA3失电而导致第三继电器的常闭触点KA32又处于闭合状态，此时第一继电器的线圈KA1无法失电，进而导致无法切断蓄电池与控制系统的连接线。
因此，本发明实施例的蓄电池的低电压保护装置，首先利用人工启动复位按钮启动继电器自保持电路以使蓄电池给控制系统供电，然后，在控制系统上电完成启动后，输出一个接点信号，并利用此接点切除自保持电路，同时由该接点保持主供电回路处于接通状态。当蓄电池的电压低于控制系统的工作电压时，该接点断开，依靠此接点的自保持电路断开，控制系统的供电电源被切断。只有当人工现场重新启动复位按钮才能重新恢复上电，有效避免了因蓄电池电压升高时自动为控制系统供电所带来的来回供电，造成控制系统损坏的问题。
需要说明的是，在本发明的实施例中，第一至第三继电器以及控制系统可由同一个蓄电池(L、N)供电，此时，继电器的工作电压范围远小于控制系统所允许的工作电压范围，以便在控制系统因蓄电池电压低而不能工作时，继电器还可以继续工作。
综上所述，根据本发明的蓄电池的低电压保护装置，主供电回路分别与蓄电池和控制系统相连，启动电路控制主供电回路导通以使蓄电池给控制系统供电，低压取消电路在蓄电池的电压小于控制系统的工作电压时控制启动电路断开以使主供电回路断开，恢复电路在用户触发下控制启动电路导通，以在主供电回路断开后，在用户触发下才能通过启动电路控制主供电回路导通，以使蓄电池给控制系统供电，从而有效防止因蓄电池直接给控制系统供电导致的低电压振荡情况，避免控制系统发生损坏，而且该装置的成本低、可靠性高，具有很强的实用性。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两 个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (6)

  1. 一种蓄电池的低电压保护装置，其特征在于，包括：
    主供电回路，所述主供电回路分别与所述蓄电池和控制系统相连；
    用以控制所述主供电回路导通以使所述蓄电池给所述控制系统供电的启动电路；
    用以在所述蓄电池的电压小于所述控制系统的工作电压时控制所述启动电路断开以使所述主供电回路断开的低压取消电路；以及
    用以在用户触发下控制所述启动电路导通的恢复电路。
  2. 根据权利要求1所述的蓄电池的低电压保护装置，其特征在于，所述启动电路包括：
    启动开关、第一继电器的第一常开触点和所述第一继电器的线圈，所述第一继电器的第一常开触点与所述启动开关并联后与所述第一继电器的线圈串联，其中，
    当所述启动开关闭合时，所述第一继电器的第一常开触点闭合，所述第一继电器的第一常开触点与所述第一继电器的线圈形成自保持电路，所述启动电路处于持续导通状态。
  3. 根据权利要求2所述的蓄电池的低电压保护装置，其特征在于，所述主供电回路包括：
    所述第一继电器的第二常开触点，其中，当所述启动电路处于持续导通状态时，所述主供电回路处于持续导通状态。
  4. 根据权利要求3所述的蓄电池的低电压保护装置，其特征在于，
    所述低压取消电路包括：检测开关和第二继电器的线圈，所述检测开关与所述第二继电器的线圈串联；
    所述恢复电路包括：第三继电器的线圈、所述第三继电器的常开触点和所述第二继电器的第一常开触点，所述第三继电器的常开触点与所述第二继电器的第一常开触点并联后与所述第三继电器的线圈串联；
    所述启动电路还包括：所述第二继电器的第二常开触点和所述第三继电器的常闭触点，所述第一继电器的第一常开触点与所述启动开关并联后与所述第二继电器的第二常开触点串联，所述第二继电器的第二常开触点与所述第三继电器的常闭触点并联，其中，
    当所述蓄电池的电压大于等于所述控制系统的工作电压时，所述检测开关闭合；
    当所述蓄电池的电压小于所述控制系统的工作电压时，所述检测开关断开，所述启动电路断开，所述主供电回路断开。
  5. 根据权利要求4所述的蓄电池的低电压保护装置，其特征在于，所述恢复电路还包括：
    复位开关，所述复位开关为常闭开关，所述复位开关与所述启动开关互锁，其中，当 所述复位开关断开时，所述启动开关闭合。
  6. 根据权利要求5所述的蓄电池的低电压保护装置，其特征在于，所述启动开关和所述复位开关构成启动复位按钮。
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CN113745038B (zh) * 2021-08-31 2023-07-25 国网河北省电力有限公司检修分公司 一种隔离开关

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